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The only reason Pluto was called a planet is because it was the first type of that object we ever found. But for centuries we didn't actually have a scientific definition of a planet. So they made a definition with multiple requirements. This search for a definition meant one of two things. Either: A. Pluto would be a planet, but so would dozens to hundreds of other 'planets' exactly like Pluto (and many larger) in our Solar System, or B. Pluto is not a planet. The latter was chosen. So we can either have 8 planets, or hundreds. Pluto is not a planet because it did not meet the criteria of being large enough to have a gravitational pull sufficient to clear away its orbit.
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The same reason you mother is sucking my wee wee [spoiler]she isn't [/spoiler]
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[b]Gus[/b]: "You hear about Pluto? That's messed up"
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It's too small.
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Size does matter! [spoiler]Apparently...[/spoiler]
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Same reason you don't have a girl friend. [spoiler]It's too small.[/spoiler]
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It's still a planet. Just now it's a dwarf plant.
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Because of its irregular orbit, because of the amount of objects bigger then it but still not counted as planets.
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Because it was to far away from ur System , also he didn't have the quality to be qualified as a ''planet''
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I think because it's a moon that drifted away. But i'm not sure lol just sounds cool to me.
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It has not cleared its orbit path of debris due to its own gravitational force.
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Another question if it's not a planet why does it orbit around the sun
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IF PLUTO IS TOO SMALL TO BE A PLANET THEN JUPITER IS TOO BIG TO BE A PLANET. #BringBackPluto2015
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To everyone saying it's too small: Thanks for explaining in more detail. To OP: After seeing more objects about the same size as Pluto farther out in the Kuiper Belt (think Asteroid Belt but at the edge of the solar system) they looked at their definition of planet and realized that it was incorrect and needed to be redefined because there were potentially hundreds or thousands of so called "planets" in the Kuiper Belt.
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I might be wrong, but I believe they recently declared pluto a planet once again.
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Because there are dwarf planets that are as big or bigger than Pluto
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Yup and my penis is too small
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It's a dog stupid.
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Apparently it's too "small". Smh.
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It is to small to be considered a planet, its moons are nearly the same size as it, the country of Russia is bigger, and since its discovery it has not completed a full orbit.
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Because it's smart than a few astroids, so I guess that's a requirement
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Edited by Jono: 12/18/2014 8:59:36 PMBecause its too small and its just a rock out in the edge of the solar system
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Because astronomers were mad that they couldn't get a good picture if it, so the just said "-blam!- it, it's not even a planet." That way they don't feel incompetent.
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Wait THIS ISN'T A MYTH
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Because it's too small to be deemed a planet
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Because -blam!- Pluto that's why.